John a



(No Model.)

,J. A.- KNAPP,

ADVERTISING DEVIGE. I

No; 284,025. Patented Aug. 28, 1883.

UNITED STATES PATENT. OFFICE.

JOHN A. KNAPP, OF CINCINNATI, OHIO, ASSIGNOR OF ONEHALF NELSON \V. STROBRIDGE, OF SAME PLACE.

ADVERTISING DEVICE.

a SPECIFICATION forming part of Letters Patent No. 284,025, dated August 28, 1883.

Application filed February 9, 1883. (No model.)

To all whom it may concern:

Be it known that I, JOHN A. KNAPP, a citizen of the United States, residing at Cincinnati, Ohio, have invented new and useful Improvements in Advertising Devices, of which the following is a specification.

My invention relates to attachments for doors, its object being to provide a device, to be actuated by the movement of the door in opening, to project into view an advertisingcase, or a figure or symbol calling attention to such case or sign, either independently or in connection with a legend or direction, such, for example, as Shut the door, Chew globe fine-cut, &c., the essential principle of my invention being the utilization of the movement of the door to set in motion certain devices in a manner calculated to arrest the attention of the person passingthrough the doorway and direct notice to the advertisement, either alone or in connection with a direction, such as Shut the door. It will be at once obvious that upon suggestion of this essential principle the invention may be carried out in a great variety of ways, according to the taste or fancy of the user, it being a well-understood fact that attention is arrested by an unexpected movement of parts more certainly than by the color or form of parts merely; and it is in recognition of this fact that many signs have come into use upon our public thoroughfares having letters composed of moving plates and otherwise con-- structed to take advantage of the principle. While, therefore, I select that mode of illustrating my invention which I deem the best for the purpose, and exhibit a simple and inexpensive device intended not only to attract attention, but also to appeal to the sense of humor, it will be understood that I do not confine myself to such form of embodying my invention, -but intend using it in many other forms within the limits of the principle stated.

The device exhibited in the drawings, and hereinafter described, consists of a hollow sign or case having substantially the form of the letter L, with a figure or parts of a figure arranged to be projected into View from the hollon body of the sign by mechanism actuated by the door in opening.

sors-fashion to one of the cards Aat 0.

Figures 1 and 2 represent the case or sign with the figure concealed and in view, re spectively; and Fig. 3 is a view of the same in position upon a door, with the front leaf or wall of the card or sign removed, exhibit ing the internal mechanism and the figure in position for concealment.

The parts hereinafter referred to are designated upon the drawings by the letters of ref erence.

The case or sign A consists of two similar leaves or plates, of metal, or wood, or cardboard, &c., held apart at the corners by separating-blocks a, to give space for the opera tion of the mechanism arranged between. The outer surface of one or both the leaves may be decorated in any appropriate manner, and may also contain an appropriate legend or direction, such'as Shut the door, and a businesscard, such as The Lithographing Company. The internal mechanism consists in this case of two levers, b b, pivoted scis At corresponding ends the levers are formed and colored to respectively represent a mans head with a countenance expressing a desire to kill, and his hand carrying a revolver readyjo be discharged, the figures being so arranged as that on being projected they simultaneously appear at the inner angle of the sign and suggest the figure of a,,revengeful person appearing at a window-opening about to shoot theintruder. The levers b b are 0011- nected at the opposite ends by a spring, as a rubber band, d, arranged to draw said ends normally together, thus projecting the figures into view. The levers are further provided with strings s s at their lower ends, as shown, which are carried through an eyelet-hole, e, in the rear wall, and unite in one string, S, which extends to and is secured to the door-jamb B.

In Fig. 3 the device is shown attached to the door 0, in which position, the door being closed, the string S is drawn taut, so as to hold the figures concealed against the action of the spring (I, and, upon the opening of the door and the consequent lengthening of the dis tance from the door-jamb to the levers b b, the spring acts by its elasticity to project the figures into view.

IOO

It will be obvious that in case of a glass door the case and figures may be similarly painted or printed on both sides, so as to show ing and closing of the door, substantially as set forth.

2. In combination with a hollow case or sign, A, one or more levers, b 1), arranged betweenthe Walls of the case or sign, and carrying a figure or symbol adapted to be projected into view by mechanism connected with the door, and actuated by openiiig and closing the door, substantially as set forth, and for'the purpose specified.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

J OHN A. KNAPP. WVitnesses:

L. M. HOSEA,

J OSEPH A. KLAYER. 

